Marketpress add ons won't activate

Hi - I've noticed that the coupon codes addon on our site won't activate. This is the same for the other 2 as well. This is for the top level site and all sites underneath as well. When we try to activate it - it simply says Activated but then if you refresh the page it goes back to deactivated. I've tested this across multiple sites across the network - same story.

Oh and support access is on.

Thanks,